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. '4 Sheets--Sheet' 1.

D. GROVE.

' (No Model.)

DRIER.

Patented Mar. 3, 1885..

Wifiwse; MM. M12? 4 Sheets-Sheet '2. D. GROVE.

(No Model.)

DRIER.

P tented Mar. 3, 1885.v

u 0 u o on u 0000 z M f 1 N. PETERS. Pmlu-Luhugnbher. Washington. D. c.

(No Model.)

1). GROVE.

DRIER.

4 Sheets-Sheet 3.

Patented Mar. 3, 1885.

4 Shets-Sheet 4. D. GROVE.

(No Model.)

DRIER.

Patented Mar. 3, 1885.

N. PETERS, 'Ywlwlilhagmplwr wmm m n c lJNiTED TATES Aren't tries.

SPECIFICATIC-N forming part of Letters Patent No. 313,416. dated lv larch 3, 1885.

Application lib-d February 29, 1.4 3.

(No model.) Iltllllt'd in Germany January 29. 1583, NoQTLIQ-I; in England January 2!). 1:483,

No. 46a; in Belg um l ebruary 7. 18B, No. (20,375, and in France February 13. Iss3, No. 153,731.

and other Materials, of which the following is a specification.

The object of this said invention is to dry 7 or arefy meat and other substances in a rapid rational manner by employing heated air. The meat or other material to be dried is turned or shifted in such manner that a thoroughly eq'uable drying or aret'action is attained and all adhesion to the shelves or sieves prevented.

The accompanying drawings show an apparatus for drying or arel'ying meat, consisting of an air-heating arrangement, the drying or arefying chambers placed or fixed immediately above the said air-heating arrangement, and the mechanical devices for operating the said apparatus.

Figure 1 is a section of the apparatus on the line 0 D in Fig. 2. Fig. 2 is a vertical longitudinal section on the line A B in Fig. t.- Fig. 3 is a cross-section on the line G H in Fig. 4. Fig. 4 is a horizontal longitudinal section of the apparatus just beneath the roof of the furnace. Fig. 5 is a front elevation showing the mechanical arrangement for moving the shelves or sieves in the arclying or drying apparatus. Fig. 6 is a cross-section of Fig. 4 on the line E F. Fig. 7 is a section of the sieves, and Fig. Sis a perspective View with some parts broken away to show others of the drying-chambers and their immediate appurtenances.

The furnace or air heating apparatus Z is located so low beneath the ground or flooring that the drying or arefying chambers M can be served with facility. The combustion-chamher 5, above the fire-bars 6, is surrounded by walls 7, of fireproof clay or other suitable refractory material, which said walls are held by suitable castiron plates, 8. These said Walls of refractory material are provided with four canals or fines. 1 2 3 4, for introducing air into the comlmstion-chamber. This said air passes through the canals or fines in the direction given by the arrows, becomes heated through contact with the hot walls of the said 1 l l l I named pipes or tubes, respectively.

canals or tines, and passes through suitable openings, 9, in the upper canal or flue, 4, into the combustion-chamber, and thus serves to so promote the combustion of the inflammable gases present in this said chamber that perfect combustion ensues and all smoke is prevented.

The sliding doors l0 11 to the furnace and ashpit, respectively, are arranged to shut airtight, and are further so arranged that they can be readily slid in each direction, in order I to be able to regulate the amount-0t air introduced into the furnace in any ordinary manner. The products of combustion stream through cast-iron pipes or tubes a a I) I) c c, in the direction given by the arrows, into the tlnc 13. and so to the chimney. These pipes a a-b b c c are provided with suitable ribs or projections, 14, to increase their heating-surface. Theend flanges ol'the aforenamed ribbed pipes or tubes (4 u, I) b c c are so supported in suitable bearings, 71, filled with fine sand, that the said tubes or pipes can readily expand and still preserve a smoke-tight joint. The

. junction of the pipes or tubes in the heating compartment is made by carefully planing the flanges and screwing them up tight against asbestus or other suitable packing. Suitable cleaning doors or openings, 15 lo. are arranged in the line, and also at the ends of the afore- The drying or arel'ying chambers M are situate above the heating-chamber; Cast-iron supports G are connected to the upper cast-iron frame, H, and form in connection therewith the framework in which the surrounding sheet-metal walls K N and the separate are'fying or drying chambers M are attached. The outer walls or casing, K, are provided with a suitable. covering of nonconducting material in order to prevent radiation. The floors or bottoms L of the drying or aret'ying chambers M are composed ot'zi n0, galvanized corrugated sheetiron, sheet-zinc. or other suitable material. The longitudinal walls N are made of perforated sheet metal, in order to permit the heated air to enter and also to leave the said arefying or drying chambers with facility after having operated on the meat or other material to be dried or subjected to arefaction. The spaces A B, between the outer longitudinal walls and the perforated sheet-metal walls N, serve to facilitate the circulation of the heated air. The exterior cold air descends on the longer sides of the heating-chamber through suitable gratings, g, is heated by coming in contact with the large heating-surface of the ribbed tubes or pipes a a b b c c, and flows upward over the somewhat int-lined ceilingoftheheating-chambertotheinletintermediate space,A. The inlet and outletspaces A and B are, as stated, separated from the heating chamber by perforated sheet metal walls N. Bracket-like projecting sheets of metal or other suitable material, d d, Figs. 1 and 4, are arranged in the inlet-space in order to distribute the heated air equally in all the drying or art-firing chambers M. The heated air enters from the inlet-space A through the perforated sheet-metal wall N into the drying or at efying chambers M, and passes through the opposite perforated metallic wall, N, into the outlet-space B, and from thence to the flue or chimney. The temperature of the heated air should not be more than 60 centigrade or 140 Fahrenheit, and is indicated by a suitable thermometer. The meat or other material to be dried or subjected to arefaction is first hacked or reduced, and is then spread in suitable thickness (generaltv about tiveeighthsinch) on suitable wire. sieves or perforated slides, P. (See Figs. 7 and 8.) These said wire sieves or slides P are moved slowly forward from one end of the apparatus to the other by means of suitable chains, It. passing over ehai n-wheels S,secured to suit able shafts or axles. T, so that a continuous operation is attained. Projecting rows of knives V,

placed at a suitable angle to each other, are attaehed to the roof of each drying or aret'ying compartment. in order to connnunieate a slight movement to the meat or other material treated,

and in order to attain the correct drying or arefaction of the same and to prevent the material sticking to the wire of the sieves or shelves. The axles or shafts T to the chainwheels S are connected to the driving drum H by gearing W, and each of the said shafts may be provided with ordinary means whereby they may be coupled or uncoupled, as may be requisite.

The said axles or shafts for the chain-wheels can be driven by means of the bevel wheels, as shown, or any other suitable device may be employed.

Having now described my said invention and the manner of carrying the same into effect, I wish it to be understood that I do not confine myself to the special form of the parts or the special arrangement of the same, as these can be varied without departing from the tenor of my said invention.

drying or arelying chambers Maud the spaces or passages A and B, for the introduction and escape of the heated air, with the canals provided with suitable gratings for the admission of cold air, and with the canals l 2 3 4 of the heating apparatus, substantially as described.

DAVlD GROVE. Witnesses:

EDWIN A. BRYDGES, ANTHONY STEFFEN. 

